Black ops (black operation)
(गोपनीय मिलिट्री अभियान)
A covert and undocumented military operation
E.g- 1. He is a black ops agent.
2. The company even resorted to an industrial black op to steal secrets from its competitor.
3. Some national intelligence agencies use black ops to undermine enemy governments.
4. He also taught her some investigative techniques and black ops stuff, such as using a credit card to break open a locked door.